EP3620248B1 - Kopplungs-einrichtung - Google Patents

Kopplungs-einrichtung Download PDF

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Publication number
EP3620248B1
EP3620248B1 EP18193443.1A EP18193443A EP3620248B1 EP 3620248 B1 EP3620248 B1 EP 3620248B1 EP 18193443 A EP18193443 A EP 18193443A EP 3620248 B1 EP3620248 B1 EP 3620248B1
Authority
EP
European Patent Office
Prior art keywords
chuck
clamping jaws
interface
control device
interfaces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18193443.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3620248A1 (de
Inventor
Eckhard Maurer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMW Autoblok Spannsysteme GmbH
Original Assignee
SMW Autoblok Spannsysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMW Autoblok Spannsysteme GmbH filed Critical SMW Autoblok Spannsysteme GmbH
Priority to EP18193443.1A priority Critical patent/EP3620248B1/de
Priority to JP2019162754A priority patent/JP7261705B2/ja
Priority to CN201910852521.2A priority patent/CN110888399A/zh
Priority to US16/566,198 priority patent/US11253931B2/en
Publication of EP3620248A1 publication Critical patent/EP3620248A1/de
Application granted granted Critical
Publication of EP3620248B1 publication Critical patent/EP3620248B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/414—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/1627—Details of the jaws
    • B23B31/16283—Indivudually adjustable jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
    • B23B31/28—Chucks characterised by features relating primarily to remote control of the gripping means using electric or magnetic means in the chuck
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37225—Tool holder, measure forces in chuck, tool holder
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/50—Machine tool, machine tool null till machine tool work handling
    • G05B2219/50183—Detect correct clamping of workpiece, chucks grip properly workpiece
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/21—Chucks or sockets with measuring, indicating or control means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/27—Separate chuck-actuating power source

Definitions

  • the invention relates to an inductively operated chuck for spatially centering a workpiece to be machined according to the preamble of patent claim 1.
  • Such a chuck requires energy and/or signal transmissions that are to be transmitted without contact and can be used in a machining center or a turning and/or milling center.
  • the EP 3 028 804 B1 to take such.
  • Signals and voltages are transmitted inductively and thus without contact from a fixed machine frame to a rotating machining center, in particular a chuck, both in the direction of the chuck and vice versa.
  • the respective machining centers or chucks have components, in particular clamping jaws, which are supported in a chuck body such that they can be moved or moved by means of an electric motor.
  • the electric motors are then switched off for safety reasons when a specified ACTUAL position is reached, the clamping jaws are locked by means of spring assemblies and mechanical friction brakes.
  • the electric motors therefore press the spring assemblies together during the clamping process, so that they apply the clamping force for the clamping jaws.
  • the mechanical friction brakes prevent the clamping jaws from slipping or loosening.
  • This transmission device can be used with a clamping unit that has an outer housing with a cylindrical basic shape.
  • the positions of the clamping jaws must be constantly monitored during the machining process, because the clamping jaws hold the workpiece to be machined centered in space and if the position of one of the clamping jaws changes during the machining process, there is a risk of machining errors or even a loosening of the clamped workpiece.
  • these components are assigned a large number of measuring sensors, which generate corresponding measurement data and transmit them via the inductive transmission devices, which are designed in two parts , namely on the one hand in the rotating chuck and on the other hand in the fixed support frame, are transferred from these.
  • the two transmission devices must therefore be aligned with one another so that the spatial separation of the two transmission devices allows rotation of the chuck and at the same time inductive transmission of measurement signals, measurement data and/or voltages for the operation of the electric motors.
  • At least one programmable interface is provided between the second inductive transmission device and the control device, which is electrically connected to the second inductive transmission device and the control device, that each interface has one or more command and control programs, through which the setting of the chuck is carried out the control device takes place or can be selected, that a large number of measuring sensors assigned to the clamping jaws, electric motors and/or the chuck are provided, by means of which their operating states are recorded and which are transmitted to the respective interface, that a comparison between the ACTUAL data stored in the command programs and the measurement data determined by the measurement sensors and that data sets are generated by this comparison of the selected operating state of the chuck with an actual operating state, which vo
  • the respective interface has been evaluated and forwarded to the control device of the chuck, the clamping jaws or the electric motors, the chuck can be connected to a customer-specific control device without any programming effort and put into operation immediately, since the command data required for controlling and monitoring the chuck and Monitoring values from the interface both in the direction of the control device and in the direction
  • the chuck and the programmable interface can be assembled and interconnected accordingly by the manufacturer and as soon as the chuck is delivered with the interface to the respective customer, the control device can be connected to the respective interface, which means that the chuck can be put into operation immediately without that time-consuming and complex programming work or adjustments of the respective customer-specific control devices to the chuck supplied are necessary.
  • the chuck, the clamping jaws and/or the electric motors, by which the respective clamping jaws are moved and fixed in their clamping position, are one Associated with a large number of measurement sensors, through which the positions, the force curves and/or other measurement data required for the operation of the chuck are generated permanently. Accordingly, the operating state of the chuck and its components is monitored and a measurement data set is generated, which is forwarded to the interface by the two inductive transmission devices from the chuck or their respective measurement sensors.
  • the interface processes and compares the measurement data records received with stored data records that correspond to the selected operating status of the chuck. If the measured data sets match the stored data sets, the respective interface forwards this result to the control device so that the actual machining process can be released, because the chuck centers the workpiece to be machined correctly.
  • the respective user of the coupling device according to the invention therefore only has to use the control device to select which of the stored operating states is to be used for the chuck used and which clamping force is to be exerted by the clamping jaws on the workpiece to be machined. Consequently, the respective user only has to make a selection and set the clamping force. Accordingly, the interface supplied by the manufacturer of the chuck can be connected to any control device of a customer and can communicate with it accordingly. The actual evaluations of the determined measurement results and the comparison of the stored data sets with the actual operating status of the chuck takes place exclusively in the interface.
  • a coupling device 1 can be seen through which a chuck 2 is to be connected to a customer-side control device 11 and monitored.
  • the chuck 2 serves to keep a workpiece 3 to be machined centered in space while it is being machined by a machine tool, not shown.
  • the chuck 2 consists of one or more clamping jaws 4, which can be moved radially in the direction of the workpiece 3, so that the diameter enclosed or formed by the clamping jaws 4 can be changed in order to remove the workpiece 3 from the chuck 2 remove or to fix this in a position-oriented manner.
  • the clamping jaws 4 are movably held in guide grooves 5 and are each driven by an electric motor 6 assigned to them.
  • a first transmission device 7 is provided in the chuck 2 and is connected to the electric motors 6 and a large number of measuring sensors 22 via electrical lines 13 .
  • the position of the clamping jaws 4 and the voltages of the electric motors 6 and their revolutions are to be measured by the measuring sensors 22 .
  • Other measurement data required for the operation of the chuck 2 are also recorded by the measurement sensors 22 and forwarded to the first transmission device 7 .
  • the rack 10 is associated with a second transmission device 8, which is arranged in alignment with the first transmission device 7 of the chuck 2. An air gap is thus created between the two transmission devices 7 , 8 , so that the chuck 2 can be moved relative to the frame 10 . Due to the inductive transmission between the two transmission devices 7, 8, the measurement data determined by the measurement sensors 22 and the voltages required for the operation of the electric motors 6 can therefore be transmitted between them. The data records entered at the control device 11 can thus also be forwarded to the chuck 2 .
  • the second transmission device 8 is connected to a programmable interface 21 by means of the electrical lines 13 .
  • the respective interface 21 is coupled to the control device 11 with an electrical line 13 .
  • the interface 21 has several command levels, namely motion, control and safety. These command levels serve to control and permanently monitor the chuck 2 .
  • the positions of the clamping jaws 4 and the voltages on the electric motors 6, which are continuously determined by the measuring sensors 22, are forwarded to the interface 21 and evaluated by it.
  • Several operating data sets for the respective chuck 2 are stored in the interface 21 .
  • the respective user selects one of the stored operating programs via the control device 11 and also sets the desired clamping force on the control device 11 , which is forwarded from this via the interface 21 to the respective electric motors 6 .
  • the electric motors 6 are activated by the interface 21, so that the clamping jaws 4 are moved in the direction of the workpiece 3 to be machined.
  • These states of motion or sequences of the clamping jaws 4 and the electric motors 6 are stored in the Motion command level. If these sequences match the stored data records, the interface 21 can determine that these sequences of movements correspond to the sequences of movements stored, as a result of which a first safety release takes place.
  • the clamping jaws 4 As soon as the clamping jaws 4 have reached their clamping position, which can be determined, for example, by the measurement sensors 22 due to an increase in the voltage at the electric motors 6, the electric motors 6 must be switched off and locked so that the clamping jaws 4 can no longer be moved, but instead are locked.
  • These operating states are stored in the control command level and the measurement data continuously recorded by the measurement sensors 22 during the voltage state are compared with the measurement data stored in the respective interface 21 . If there are no corresponding discrepancies between the stored data records of the operating status and the actual data records of the operating status, the interface 22 issues a further safety release, so that the machining process is not interrupted or can be released when the clamping jaws 4 are adjusted.
  • the further safety command level is provided in the interface 21, by means of which mechanical friction brakes in particular are monitored. These friction brakes monitor the locking of the clamping jaws 4.
  • the electric motors 6 are switched off after the clamping position has been reached. This measurement data can thus also be recorded by the respective interface 21 and forwarded to the control device 11 .
  • the measurement data continuously determined by the measurement sensors 22 are compared in a stored operating state data set and as soon as a correspondingly specified deviation should exist, the respective interface 21 generates a corresponding control signal, as a result of which the processing by the control device 11 is interrupted. As long as the measurement data sets received match the stored operating states in the form of corresponding data sets, the processing is not disrupted and can be continued.
  • FIG 3 a redundant monitoring of the chuck 2 is shown because two interfaces 21 are electrically coupled to the second inductive transmission device 8 . Both of the interfaces 21 receive the measurement data records from the measurement sensors 22 independently of one another and evaluate them independently of one another. The two interfaces 21 are electrically connected to one another and as soon as the comparisons between the measurement data sets received and the stored operating states have been carried out, the interfaces 21 communicate with one another and if their measurement results or comparisons match, then the control device 11 receives a release signal so that the processing process is initiated can be, since the chuck 2 are aligned in their clamping position.
  • the machining process must be interrupted or cannot be released, since there may be a malfunction in the chuck 2 or its clamping jaws 4 or electric motors 6. Such a malfunction must first be checked.
  • the two interconnected interfaces 21 accordingly increase the safety for the operation and the setting of the chuck 2, they therefore have a redundant safety-increasing function. Both interfaces 21 work independently of one another and receive the measurement data determined by the measurement sensors 22 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Gripping On Spindles (AREA)
EP18193443.1A 2018-09-10 2018-09-10 Kopplungs-einrichtung Active EP3620248B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18193443.1A EP3620248B1 (de) 2018-09-10 2018-09-10 Kopplungs-einrichtung
JP2019162754A JP7261705B2 (ja) 2018-09-10 2019-09-06 結合装置
CN201910852521.2A CN110888399A (zh) 2018-09-10 2019-09-10 联结设备
US16/566,198 US11253931B2 (en) 2018-09-10 2019-09-10 Coupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18193443.1A EP3620248B1 (de) 2018-09-10 2018-09-10 Kopplungs-einrichtung

Publications (2)

Publication Number Publication Date
EP3620248A1 EP3620248A1 (de) 2020-03-11
EP3620248B1 true EP3620248B1 (de) 2022-06-22

Family

ID=63667688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18193443.1A Active EP3620248B1 (de) 2018-09-10 2018-09-10 Kopplungs-einrichtung

Country Status (4)

Country Link
US (1) US11253931B2 (zh)
EP (1) EP3620248B1 (zh)
JP (1) JP7261705B2 (zh)
CN (1) CN110888399A (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH718199A1 (de) 2020-12-21 2022-06-30 Erowa Ag Überwachungsanordnung, Spannsystem mit Überwachungsanordnung und Verfahren zur Überwachung einer Spannvorrichtung mittels Überwachungsanordnung.
CN114042947B (zh) * 2021-11-05 2022-10-11 西安理工大学 一种基于莫氏锥结合的四爪自动调心装置与方法
CN114131068B (zh) * 2021-11-05 2022-10-11 西安理工大学 一种基于端齿传动的四爪自动调心装置与方法
EP4303670A1 (de) 2022-07-05 2024-01-10 SMW-AUTOBLOK Spannsysteme GmbH Werkzeugnmaschine und verfahren zur steuerung einer werkzeugmaschine

Family Cites Families (26)

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US4540318A (en) * 1982-07-29 1985-09-10 Robert Bosch, Gmbh Rotary electrical tool with speed control, especially drill
DE3374181D1 (en) * 1982-11-10 1987-12-03 Roehm Guenter H Power-actuated clamping chuck
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JP3465575B2 (ja) * 1998-03-10 2003-11-10 三菱電機株式会社 数値制御方法及びその装置
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Also Published As

Publication number Publication date
CN110888399A (zh) 2020-03-17
EP3620248A1 (de) 2020-03-11
US11253931B2 (en) 2022-02-22
JP2020075342A (ja) 2020-05-21
US20200078872A1 (en) 2020-03-12
JP7261705B2 (ja) 2023-04-20

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